Octocentric human ring chromosome (Xr): proposed mechanism of formation.
D002610:Cheek / Q000166:cytology; D002869:Chromosome Aberrations; D046508:Culture Techniques; D003582:Cytogenetics; D006801:Humans; D007962:Leukocytes / Q000166:cytology; D008938:Mitosis; D011123:Polyploidy